Security has been stepped up at the Republic of Ireland’s training base in Versailles after a double murder where the suspect is said to have declared his allegiance to Islamic State.

There was a more prominent police presence at the Stade de Montbauron on Wednesday morning as a result of the stabbing to death of a police commander and his wife at Magnanville - around a 30-mile drive from Versailles, to the west of Paris - on Monday evening.

The Frenchman suspected of killing the two police officers declared his allegiance to IS leader Abu Bakr al-Baghdadi and threatened to kill non-believers, according to Paris prosecutor Francois Molins.

Attacker Larossi Abballa made the declaration in exchanges with police during the stand-off on Monday night.

Mr Molins said Abballa, who was also found dead in the house after the stand-off, responded to IS calls to kill non-believers and their families wherever they live.